US5632901A - Process for the elimination of heavy metals - Google Patents

Process for the elimination of heavy metals Download PDF

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Publication number
US5632901A
US5632901A US08/389,407 US38940795A US5632901A US 5632901 A US5632901 A US 5632901A US 38940795 A US38940795 A US 38940795A US 5632901 A US5632901 A US 5632901A
Authority
US
United States
Prior art keywords
heavy metals
white water
elimination
present
resins
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/389,407
Other languages
English (en)
Inventor
Bengt T. Engstr om
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kemira Kemi AB
Original Assignee
Kemira Kemi AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kemira Kemi AB filed Critical Kemira Kemi AB
Assigned to KEMIRA KEMI AKTIEBOLAG reassignment KEMIRA KEMI AKTIEBOLAG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENGSTROM, BENGT THOMAS
Application granted granted Critical
Publication of US5632901A publication Critical patent/US5632901A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/206—Manganese or manganese compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/902—Materials removed
    • Y10S210/911—Cumulative poison
    • Y10S210/912—Heavy metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/928—Paper mill waste, e.g. white water, black liquor treated

Definitions

  • the present invention relates to the elimination of heavy metals from white water in the pulp and paper industry.
  • the object of the present invention is to obtain a possibility to eliminate heavy metals from a closed white water system within the pulp and paper industry.
  • the resins can be precipitated chemically by using flocculation agents followed by flotation or sedimentation whereby the white water as such can be treated using such a flocculating agent.
  • the process is preferably carried out at a pH of between 6.5 and 11, more preferably between 7 and 9.5.
  • a pH of between 6.5 and 11 more preferably between 7 and 9.5.
  • the white water contains a large amount of heavy metals and other metals, such as W, Cr, Cd, Pb, Bi, Co, Se, Hg, Ni, Zn, Ti, Cu, Mn, Mo, Sr, Fe, As, V, Al, S, Mg and Ca.
  • the latter two should, desirably, not be eliminated.
  • a synthetic coagulant is used as flocculation agent, such as polyimine, polyimide, polyacrylic amide, polyethylene oxide, phenolic resins, or combinations thereof.
  • a coagulant such as aluminium sulphate, aluminium chloride, polyalumnium sulphates, polyaluminium chlorides, or the similar to the white water, but an effective precipitation of the resins and the heavy metals are obtained by using a flocculant only.
  • the present process is preferably carried out at the pulp manufacturing site, whereby the necessity for carrying out the process in a subsequent paper production stage is more or less eliminated.
  • the pulp will be freed of the heavy metals in the pulp manufacturing stage.

Landscapes

  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paper (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
US08/389,407 1994-02-21 1995-02-16 Process for the elimination of heavy metals Expired - Fee Related US5632901A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9400585A SE504789C2 (sv) 1994-02-21 1994-02-21 Förfarande för tungmetalleliminering från bakvattensystem inom pappers- och pappersmassaindustrien
SE9400585 1994-02-21

Publications (1)

Publication Number Publication Date
US5632901A true US5632901A (en) 1997-05-27

Family

ID=20393020

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/389,407 Expired - Fee Related US5632901A (en) 1994-02-21 1995-02-16 Process for the elimination of heavy metals

Country Status (13)

Country Link
US (1) US5632901A (enrdf_load_stackoverflow)
EP (1) EP0669422B1 (enrdf_load_stackoverflow)
JP (1) JPH0833892A (enrdf_load_stackoverflow)
AT (1) ATE210218T1 (enrdf_load_stackoverflow)
AU (1) AU681734B2 (enrdf_load_stackoverflow)
CA (1) CA2142954A1 (enrdf_load_stackoverflow)
DE (1) DE69524272T2 (enrdf_load_stackoverflow)
ES (1) ES2164752T3 (enrdf_load_stackoverflow)
FI (1) FI950761L (enrdf_load_stackoverflow)
NO (1) NO306308B1 (enrdf_load_stackoverflow)
NZ (1) NZ270530A (enrdf_load_stackoverflow)
PT (1) PT669422E (enrdf_load_stackoverflow)
SE (1) SE504789C2 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000026147A1 (en) * 1998-10-30 2000-05-11 Igor Robertovich Magunov Method for purifying and softening water
USH1852H (en) * 1997-12-05 2000-06-06 Morton International Inc. Waste treatment of metal plating solutions
US6093422A (en) * 1998-01-23 2000-07-25 Zodiac Pool Care, Inc. Biocidal compositions for treating water
RU2171233C1 (ru) * 2000-10-19 2001-07-27 Фирма "Далекс Трейдинг Лимитед" Способ очистки промышленных стоков

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873418A (en) * 1970-02-09 1975-03-25 Savo Oy Method of recovering noil fibres and soluble wood material from waste water
JPS5358002A (en) * 1976-11-05 1978-05-25 Sanyo Kokusaku Pulp Co Process for removing suspended material in sulphite pulp waste from broadleaf trees as raw material
US4921613A (en) * 1987-12-23 1990-05-01 Boliden Aktiebolag Method for purifying resin-containing waste liquor in the manufacture of cellulose pulps
US5368693A (en) * 1991-12-16 1994-11-29 A. Ahlstrom Corporation Apparatus for treating white water
US5435921A (en) * 1994-05-09 1995-07-25 Nalco Chemical Company Vinylamine polymers and coagulants for removing color from paper mill effluents

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3488720A (en) * 1967-04-06 1970-01-06 American Cyanamid Co Process of manufacturing polyacrylamide-based flocculant and flocculations therewith
JPS56101992A (en) * 1980-01-11 1981-08-14 Kurita Industrial Co Ltd Recovery of valuable substance from white liquor
DE3627407C2 (de) * 1986-08-13 1994-05-19 Steinbeis Temming Papier Gmbh Verfahren zur Reinigung von Wasserkreisläufen bei der Halbstoff- und Papierherstellung
SE500783C2 (sv) * 1992-05-05 1994-09-05 Eka Nobel Ab Sätt att rena vedhartsinnehållande process- eller avloppsvatten
SE9301160L (sv) * 1992-08-28 1994-03-01 Sunds Defibrator Ind Ab Förfarande för behandling av processvatten
US5509999A (en) * 1993-03-24 1996-04-23 Kamyr, Inc. Treatment of bleach plant effluents

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873418A (en) * 1970-02-09 1975-03-25 Savo Oy Method of recovering noil fibres and soluble wood material from waste water
JPS5358002A (en) * 1976-11-05 1978-05-25 Sanyo Kokusaku Pulp Co Process for removing suspended material in sulphite pulp waste from broadleaf trees as raw material
US4921613A (en) * 1987-12-23 1990-05-01 Boliden Aktiebolag Method for purifying resin-containing waste liquor in the manufacture of cellulose pulps
US5368693A (en) * 1991-12-16 1994-11-29 A. Ahlstrom Corporation Apparatus for treating white water
US5435921A (en) * 1994-05-09 1995-07-25 Nalco Chemical Company Vinylamine polymers and coagulants for removing color from paper mill effluents

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USH1852H (en) * 1997-12-05 2000-06-06 Morton International Inc. Waste treatment of metal plating solutions
US6093422A (en) * 1998-01-23 2000-07-25 Zodiac Pool Care, Inc. Biocidal compositions for treating water
US6217780B1 (en) 1998-01-23 2001-04-17 Zodiac Pool Care, Inc. Biocidal compositions for treating water
WO2000026147A1 (en) * 1998-10-30 2000-05-11 Igor Robertovich Magunov Method for purifying and softening water
RU2171233C1 (ru) * 2000-10-19 2001-07-27 Фирма "Далекс Трейдинг Лимитед" Способ очистки промышленных стоков

Also Published As

Publication number Publication date
AU1234795A (en) 1995-08-31
EP0669422B1 (en) 2001-12-05
DE69524272D1 (de) 2002-01-17
FI950761A0 (fi) 1995-02-20
NO306308B1 (no) 1999-10-18
FI950761A7 (fi) 1995-08-22
ES2164752T3 (es) 2002-03-01
PT669422E (pt) 2002-05-31
EP0669422A3 (enrdf_load_stackoverflow) 1995-09-20
NO950622D0 (no) 1995-02-20
NO950622L (no) 1995-08-22
EP0669422A2 (en) 1995-08-30
SE9400585D0 (sv) 1994-02-21
JPH0833892A (ja) 1996-02-06
FI950761L (fi) 1995-08-22
SE9400585L (sv) 1995-08-22
DE69524272T2 (de) 2002-07-18
NZ270530A (en) 1996-06-25
AU681734B2 (en) 1997-09-04
SE504789C2 (sv) 1997-04-28
ATE210218T1 (de) 2001-12-15
CA2142954A1 (en) 1995-08-22

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Owner name: KEMIRA KEMI AKTIEBOLAG, SWEDEN

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Effective date: 19950207

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LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20050527